Tabulating mechanism for type-writing machines.



0. C. KAVLE. TABULATING MBGHANLSM PoR TYPE WRITING MACHINES.

APPLICATION FILED JUNE 4, 1909.

Patented Jan. 14, 1913.

3 SHEETS-SHEET l.

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0. C. KAVLE.

TABULATING MECHANISM Pon TYPE WRITING MACHINES.

APPLICATION, FILED JUNE4, .1909. i 1,050,548. Patented Jan. 14,1913.

3 SHEETS-SHEET 2.

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- -/ZZarfzeg l 0. C. K-AVLE.

TABULATING MBCHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED JUNE 4, 1909.

1,050,548. l Patented Jan. 14, 1913.

3 SHEETS-SHEET 3.

To all whom't may concern:

UNITED sTATEs PATENT oEEIoE.

OSCAR c.. KAVLE, oF SYRACUSE, NEW YORK, AssIGNoR To HARVEY A. MOYER, 0F

sYRAcUsE, NEW YORK.

TABl'J'LA'IINGV MECHANISM FOB.y TYPE-WRITIG MAGI-IIN ES.

Specification of Letters Patent.

Patent-ed Jan. 14., 1913.

Application iledrJ'une 4, 1909. Serial No. 500,165.

Be it known that I, OSCAR O. KAvLE, a. citizen of the United States,residing at Syracuse, in the county of Onondaga and State of New York,have invented a' new and useful Improvement in Tabulating Mechanisms forType-VVriting Machines, of Which the following is a specification.

This invention enabling the carriage to be quickly moved -to differentdesired positions to produce writing machines of ordinary construction'`without interfering` with their ordinary use; that can be operated bysimply depressing a tabulating. key and without requiring the key to beheld down; also to provide a device of novel construction for absorbingrthe shock incident to stopping the carriage; and also toimprove'tabulating mechanisms in"the respects hereinafter described andset forth in the claims.

In the accompanying drawings, consist.,- ing of three sheets: Figure 1is a fragmentary rear elevation of a typewriting machine provided withtabulating mechanism embodying the invention. Fig. 2 is a.' plan viewthereof. Figs. 3 and 4 are similar fragmentary rear elevations thereof,partly in section, showing two different positions of the parts. Fig. 5is a longitudinal s ectional elevation thereof, on an enlarged scale, inline 5 5, 3. Fig. 6 is a fragmentary perspective view thereof. Fig. 7 isa longitudinal sectional elevation thereof in line 7-7, Fig; l. Fig. 8is a cross scction, on an enlarged scale, of the shock abL sorbcr. F ig.9 is an elevation of the'valve of the shock absorber.

Like reference characters refer to like parts 'in the several figures.The invention is shown in the drawings applied to a front strike machinein which the'platen is shiftable vertically for printrelates totabulating. mechanisms for typewritmg machines .for

by the usual spring motor or other meansl (not shown), and which ispivoted at d d at the upper rear portionv ofthe main frame to swingvertically for shifting the platen.

E represents the escapement Wheel of the mechanism which governs theletter space movements of the carriage. This escapement wheel is securedto the rear end of a shaft which is journaled in a bearing e on theshift frame and is provided at its Afront end with a pinion e thatmeshes with a rack bar F on the carria e. secured to or forme with a rodf which is secured at its ends to the rear' ends of carriage releaselevers f fulcrumed at f2 on the ends of the carriage. Springs (notshown) act to hold the rack bar vin operative engagement with theescapcment pinion e2 except when the rack bar is purposely raised byactuating either of the levers f', or a tabulating key to release thecarriage/from the cscapement. The parts as thus far described may be ofknown or any suitable construction. f

Theirregular movements of the 'carriage necessary for producingtabulated work are effected by releasing the carriage from theescapemcnt and arresting the motion of the carriage by the drivingspring drum or motor at the desired points by a stop device which iscaused tof' intercept coperating ad. justable stops provided on thecarriage. For` clearness of description, the stops on the carriage willbe hereinafter referred to as carriage stops and the coperating stopdevice as the stop. G represents the carriage. stops, of which anydesired number, one or more, maybe adjustably mounted Aon the carriagein any' suitable way. Each stop shown has a'spring clip g which embracesthe upperedge of the rack bar andfdetachably retains the `sto thereonwith a tooth on the stop in engag ment with a serrated'rear face g onanupwardly and rearwardly extending portion of the r'ack bar to preventthe stop from shifting onv the rack bar. T he front end of the The rackbar F is spring clip g forms an index which coper. 110

.intercepting stops which normally stand l `shift frame D, and bothstops H and Hvare pivoted at their lower ends to the free ends' out ofen side by side below the path of movement of the sto s G, as shown inFig. 1, and are adapte to be raised to a position. to intercept thecarriage stops to arrest the carriage. The main stop H is pivotedbetween its ends to the free ends of links lz. It which are pivoted atthei outer ends to a lug h2 on the of links h3 which are pivoted attheir other ends to the piston rod or movable art of a dash pot orshock-absorber, hereina ter described. These links constitute a movableor floating support for the intercepting stops which enables the severalmovements of the stops hereinafter described. The link h preferably hasa rigid lifting linger h4 which projects therefrom beneath the ledge g3of the rack bar for lifting the rack bar agement with the escapementpinion e w en using the tabulating mechanism.

H2 represents a lug on the shift frame Whichserves to limit the movementof the stops H and H by the carriage and form a back stop or abutmenttherefor.

The actuatin mechanism for the stops H H is preferab y constructed asfollows: I represents a rock shaft suitably journaled on the shift framein rear of the stops H H and provided with a rigid arm z' which projectsforwardly under the upper stop-supporting links\ It. When the shaft I isrocked, this arm z' raises the links and places the upper ends of thestops H H in position to intereept the carriage stops G, and the liftingfinger It* on the link /L engages the `ledge g3 f the rack bar' andlifts the rack bar out of engagement with the pinion e to free thecarriage from the escapement. The partsl will then be in the positionshown in Figs. E and The rockshaft l provided near its outer end with anarm 2". Figs. l, 2 and 7, connected by a link e' 1o a lever 2'3 lwhichis pivoted on the top plate of the main frame and is connected h): a rodz" to a tabulator key lever li :chich is t'ulerumed on the main frameand extends forwardly to the key-board. A suitable spring 7c, Fig. l, isprovided for returning the rock shaft to the normal position, afteractuation. The link i2 is so arrangedthat in the normal H intointercepting position could be em-y ployed.

L, Figs. 1 and 3-6, represents a spring which connects the auxiliarystop H to one of the links lr2 and holds the upper end of said stopagainst a stationary pin l projecting from a suitable part of the shiftframe 'through an opening Z in the main stop, so that when the stops H Hare raised by depressing the tabulator key, a shoulder l2 on theauxiliary stop will snap over the pin l and hold the stops up in theintereepting position until released by the engagement of thecarriagestop with the auxilia stop H', without requiring thetabulatorlgey to be held down until the carriage is stopped. Mrepresents a spring connecting the u per stop-supporting links It /Lwith a stud m projecting from the shift frame for lowering the stops H Hout of engagement with the carriage stop after arresting the car-4riage.

N represents the cylinder of the dash-p0t or shock absorber, and n t-hpiston thereof. The cylinder is preferably made integral with the shiftframe and has a screw head provided Awith a stuffing box n through whichextends the piston rod n2 to which the lower-supporting links h3 for thestops H H are pivoted. The piston closel fits the cylinder and has .anumber of ho es n through it, and is provided at one side with a valveor disk n* which has a limited movement toward and from the latter. Thevalve is of smaller diameter than the piston and has a single hole nwhich is kept in register with one of the holes in the piston by a pin nprojecting from the iston through a holeY in the valve. The cy inder islfilled with oil. When the carria stop strikes the main stop H it willswing the latter about its pivotal connection with the upper-supportinglinks k h to the position shown in Fig. 4. and move the piston ninwardly. The oil will pass freely through the several holes n3 of thepiston and offer only slight resistance to the first portion of themovement of the piston, but the valve will then be seated against thepiston by the pressure of the oil thereon and close all of the holesexcept that registering with the hole a5 in the valve, therebymaterially increasing the resistance and checking themetion of thepiston and the main stop H. A

spring O surrounding the piston rod re-l ystop G by the spring M. In thereturn movement of the pistonv the valve n* uncovers the holes in thepiston and permits a rapid motion thereof. The dash-pot could beconstructed in other Ways and 'ettect the described action of thepiston, starting rapidly, then retarding in its movement in onedirection andreturning rapidly.

The operation of the tabulating mechanism'is as follows: The carriagestop or stops G is or are adjusted to stop the carriage at the desiredpoint'or points. The

tabulating keyK is then rdepressed, which raises the stops H and H" inposition to intercept the carriage stop, and releases the carriage fromthe escapement in the manner stated, and the auxiliary stop H catches onthe pin Z and holds thestops up, permitting the tabulating key to bereleased. The parts are then in the position shown in Figs. 3 and 5. Thecarriage is then moved by its driving' spring or motor to the left (tothe right. in the rear views ofFigs. 1-4)until the carriage stop Gstrikes the main stop l-l. The momentum of the carriage swings the stopto the position shown in Fig. 4 and forces-thc piston inwardly in thedash-pot, the described action ofthe dash-pot causing the carriage to bebrought to a stop gradually, or without shock. Just before rthe mainstop ll is moved into contact with the back stop ll2 the carriage stop(lr strikes the auxiliary' stop ll, which disengages it from4 the pin Zand permits thestops to be returned to their initial position b y thereturn springs M and t). The described action of the dash-pot permitsthe sto-ps to be rapidly restored to their normal position. The momentumof the carriage has been overcome and the carriage brought almostI to astandstill before the auxiliary stop H is thus released. The opening inthc main stop l-l through which' the latch pin Z for the auxiliary stoppasses, is large enough Ato allow the several movements of the mainstop, 2'.. e., upwardly, then laterally, next downwardly and finallyback to the initial position, without interference with the pin. `Theshock .absorber described will completely overcome the momentum of aIcarriage of ordinary weight., even when it is permittedto run the Lfulllength of its travel, beforethe carriage forces the main lstop vHagainst 'the fixed abutment, H2, as shown in Figa', butthe continued.pull of the earriagejdriving spring on the carriage after the momentumof the lat-ter is overcome almost'. instantly moves the stop against theabutment. The abutment serves only to prevent over movement vtoarresting the carriage is almost of the stops H and H under the actionof the carriage driving spring after the momentum ofthe carriage isovercome by the dash-pot. The carriage is stopped dead, or without theleast tendency to rebound, by the described mechanism, and the `usualnoise and vibration of the machine incident eliminated.

I represents a hooleshaped arm on the `i inner end of the rock shaft I.Zhen the shaft is rocked and releases the rack bar F from the escapementpinion, the end of this arm' is. swung rearwardly between the teeth ofthe escapement wheel E, and moves the wheel backwardly about one-quarterof a tooth space and holds it there until the rack bar is again engagedwith the pinion. This insures the proper meshing of the rack bar andpinion even if the rack bar returns 4before the main stop' 1s forcedclear back against the back stop H2, and prevents theA carriageescapement from acting one letter space at the-time the rack loarrengages the pinion. l 5

The parts are so proportioned and arranged that the rackr bar F rengagesthe.

escapement pinion e before the main 4stop entirely l clears the carriagestop, thus restoring the carriage to the control of the cscapementbefore releasing it from the Vtabulating mechanism. In case a secondcarriage stop G is used wit-hin two or three letter spaces of the firstone, it would belocated di rectly over the main sto H, when the carriageis arrestedby t e first stop G, and when the tabulating key is againdepressed the main stop H will strike this second carriage stop-'G andraise the rackbar higher than usual, but when the carriage moves, thesecond carriage stop (l will slide downthe inclined end of the main stopH and engage .the auxiliary stop H', which will arrest the carriage inthe proper position.' Thus two carriage stops Gr can be placed on therack bar with but a single letter space between them, if so desired.

The action of the dash-pot described is different from the pneumaticdevices heretofore employed, for the latter provide elastic cushionswhich increase the tendencyv ofthe carriage to rebound, whereas theformer, while preventing shock, does not make an elastic cushion and thecarriage has no tendency to rebound. The described mechanism is alsoentirely different in action from a friction governor, for it permitsthe carriage to travel at full speed as soon as i'eleased until thestops contact, and is free from the.wear .incident to frictional de`rvices.

The dash pot or shock absorber herein de-` scribed and containing .n.-uelastic liquid is radically different from an air lilled cylinder,and different means .are required' $95130 apply the two devices. An airfilled cylinder answers to absorb the shock but it-has the fatalobjection of increasing the reboundv of the carriage, while the liquiddash-poter device described absorbs the shock efficiently and entirelyovercomes the tendency lof the carriage to rebound. l

A shock absorber operating as'described would also be desirable forusein connection with the margin stops that limit the ex anism of differentconstruction.

The shock absorbing means are also adapted to such machines as bookltypewriters which have a stationary platen and a lcarriage act-ing tomove the printing mechanism over the paper, and to adding andcalculating machines that move either th'e paper or printing mechanismby jumping over a considerable distance.

I claim as my invention: y

1. In a typewriting machine, the combination with a laterally movablecarriage, and a support for the carriage, of a stop on one of saidparts, a movable intercepting stop on the other part, an4 abutment forthe intercepting stop, and a dash-pot which governs the movement of theintercepting stop from the intercepting positiontoward said abutment,substantially as set :foi-th.

2. In a typewriting machine, the combination with a laterally movablecarriage, and a support for the carriage, of a stop on one of saidparts, a movable intercepting lstop on the other part, and a dash-potwhich governs the movement of said intercepting stop and has a valvewhich allows the movable part ofthe dash-pot to move in one directionwith greater freedom than in the other. substantially as set forth.

3. In a tabulating mechanism for typewriting machines, the combinationwith a motor-driven carriage having a stop moving therewith, of a liquiddash-pot comprising relatively movable members, and an intercept-ingstop which is moved by the contact of the carriage stop therewith andacts on the dash-pot to graduallystop the carriageysubstantially as setforth.

- nati'on with a laterally movable carriage.

,and an escapement controlling the carriage,

of coperating stops. one vof which moves with the carriage, means forplacing one of said stops in position to intercept the other and forreleasing'the carriage from the eseaPement, one of said .stops beingmoved by contact with the other, and a liquid dashpot for resisting saidmovement of said stop,

Asubstantially as set forth.

-nation with a laterally movable carriage having a stop movingtherewith, and a shift frame for the carriage, of a dash-pot supported bv the shift frame and moving therewith, and means by which the carriagestop acts on the dash-pot to stop the carriage with a retarding motion,substantially as set forth.

7. I n a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, and a shift frame for thecarriage, of an intercepting stop on the shift frame which interceptsthe carriage stop and is moved by contact there with, and a dash-pot onthe shift frame and moving therewith which resists said movement of saidintercepting stop, substantially as set fort-h.

8. In a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, andan escapement controllingthe carriage, of an intercepting stop normally out' of line with thecarriage stop, means for placing said intereeptingr stop in position tointercept the earriage'stop and for releasing the carriage from theescaIfment, means for automatically holding said. intercepting stop inintercepting position, said intercepting stop heing movable bycontactwith the carriage stop, and a dash-pot for resisting the movementof said intercepting stop, substantially as set forth.

9. In a typewriting machine. the combination with a laterally moablecarriage having a stop moving therewith, and an escapement controllingthe carriage. of an intercepting stop normally out of line with thecarriage stop, means for placing said g intercepting stop in position tointercept the carriage stop and for releasing the carriage 4. In atypewritmg machine. the combifrom the escapement, means for locking theescapement until the carriage is rengaged with the escapement, saidintercepting stop being movable by contact with the carriage stop, and adash-pot for resisting the movement of said intercepting stop,substantially as set forth.

. 10. In a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, a rack bar on the carriage, aneseapement mechanism having a pinion meshing with the rack bar, anintercepting stop movable transversely of the rack bar, and means forfirst moving the interceptingstop into line with the carriage stop andthen moving both stops together with the rack bar to disengage the rackbar from the pinion, substantially as set iorth.

l1. In ay typewrit-ing machine, the combination with a laterally movablecarriage having a movably mounted rack bar moving therewith, of acarriage stopv adjustably mounted on the rack bar, an intercepting stopnormally out of line with the carriage stop, a pinion normally meshing'with the rack bar, an escapement wheel connected to the pinion, andmeans for first moving the intercepting stop into line withv thecarriage stop, then moving both stops and the rack bar to disconnect therack bar from the pinion, and at the same time locking the escapementwheel against rotary movement, substantially as set forth. 1Q. In atypewriting machine, the combination with a laterally movable carriagehaving a stop moving therewith, of main and auxiliary intercepting stogsarranged in parallel planes and normally out of line with the carriagestop, and means for simultaneously moving both of said intercept-ingstops into line with the carriage stop, substantially as set forth.

13. In a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, of main and auxiliaryintercepting stops arranged in parallel planes one in advance of theother and both normally out of line with the earriage, stop, and meansfor pro]ectxng both of said stops simultaneously into line with thecarriage stop, substantially as set forth.

la. In a typewritingmachine, the combi-v nation with a laterally movablecarriage having a stop moving therewith, of main and auxiliar-yintercepting stops arranged one in advance of the other and bothnormally out of line with the carriage stop, means for moving said stopsinto line with the carriage stop, and means cooperating with said auX-iliary stop for holding said intereepting stops in intereepting'position until the carriage stop strikes said auxiliary stop,substantially as set forth.

15. In a. tyoewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, of main. and

auxiliary intercpting stops arranged one in advance of the other andboth normally out of line with the carriage stop, meansfor moving saidstops into line with the carriage stop, means cooperating with saidauxiliary stop for holding said intercepting stops inv interceptingposition until the carriage stop strikes said auxiliary stop, andl adash-pot forv resisting movement of said main intercepting stop by thecarriage stop, substantially as set forth. 1

16. In a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, of a movable intercepting stop,pivoted links supporting said Iintereepting stop and connected to thestop at different points, and means for moving said intercepting stopinto position to intercept the `carriage stop, substantially as setforth.

17. In a typewriting machine, the combination with a laterally movablecarriage having a stop moving therewith, of a movable intercepting stop,pivoted links supporting said intereepting stop and connected to thestop at dilterent points, means for moving said intercepting stop intoposition to intercept the carriage stop, and a shock absorber connectedto one of said supporting links for resisting movement of saidintercepting stop porting frame for the tloating stop, and

means for moving the floating stop into line with the carriage stop,substantially as set forth.

1S). In a typewriting machine, the combination with a laterally movablecarriage having astop moving with the carriage, of a movably mountedintercepting stop normally oat of line with the carriage stop, meansfoumoving .the intercepting stop bodily into line with the carriagestop, said intercel'iting stop being also movable laterally with thecarriage stop, means for limiting the lateral movement of theintercepting stop with the carriage stop, and means for moving` theintereepting stop out of engagement with the carriage stop and returningit laterally to the initial position, substantially as set forth,

`Witness my hand, this'27th day of May,

OSCAR C. KAVLE. 'itnesses i GERTRUDE Eiv'rz, FRANK E. REID.

